HTML, CSS: overbar matching square root symbol

Question

Is there a way in HTML4 and/or CSS to do the following, but then correctly:

√¯¯¯¯¯¯φ·(2π−γ)
    ↑ ← ←  ←

How can I move my expression to the left, under the ¯ symbols, such that they overlap eachother? Note: it should work on every font-size.

Thanks!

_{(My current code, thank you Matthew Jones⁽⁺¹⁾ for the text-decoration: overline, lacks the scaling of sizes and correctly positioning the overline. That's why I edited this question, as ¯ does match in size & position in the Georgia font.)}

Answer 1

You could set the CSS for the text that should appear under the overbar as

text-decoration:overline

EDIT: This comes pretty darn close to what you want (Chrome 4.1.249):

<div style="font-family: Georgia; font-size: 200%">
    <span style="vertical-align: -15%;">&radic;</span>
    <span style="text-decoration: overline; vertical-align:-20%;">&nbsp;x&nbsp;+&nbsp;1&nbsp;</span>
</div>

Unfortunately there does not appear to be a way to modify the thickness of the overline itself...

Answer 2

you miight be able to put the characters under the root in a seperate span then style it with a border on top. But you'll probably have to increase the font-size of the √ to make it line up.

Answer 3

<math xmlns="http://www.w3.org/1998/Math/MathML">
    <msqrt>
        <mrow>φ(2π−γ)</mrow>
    </msqrt>
</math>